Integrin
One of a large and very important family of adhesion molecules that promote stable interactions between cells and their environment. The integrins also act as cellular sensor and signaling molecules. Integrins contain two types of subunits called alpha and beta. All of the alpha subunits have some similarity to each other, as do all of the beta subunits.
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- Integron
A mobile DNA element that can capture and carry genes, particularly those responsible for antibiotic resistance. Integrons do this by site-specific recombination. There are at least three classes of integrons based upon which integrase gene they contain. The antibiotic resistance genes that integrons capture are located on gene cassettes. These cassettes can exist as free […]
- Intelligence quotient
An attempt to measure the intelligence of someone. Abbreviated IQ. The IQ score is usually based upon the results of a written test. To calculate the IQ, the person’s mental age as determined by a test is divided by chronologic age, and the result is multiplied by 100. See also intelligence test; intelligence, non-verbal; intelligence, […]
- Intelligence test
A questionnaire or series of exercises designed to measure intelligence. There are many types of intelligence tests, and they may measure learning and/or ability in a wide variety of areas and skills. Scores may be presented as an IQ (intelligence quotient), as a mental age, or on a scale.
- Intelligence, non-verbal
Innate or learned ability to understand and carry out motor tasks, such as solving physical puzzles. Also called performance IQ.
- Intelligence, verbal
The innate or learned ability to understand and answer questions given in writing or ‘verbally.